Material Characteristics:The most common type of bicycle is the iron frame, but the iron frame is also divided into chromium molybdenum steel, high tensile strength steel, normal steel and other components added to the iron frame. With these other components added, it can be made into thinner tubes, making the entire frame lighter. Frames using materials other than iron, such as aluminum alloys, have appeared without reducing strength. There are frames made of titanium and carbon fiber in bicycle racing.
(1) Chromium-molybdenum steel frames: Before the 1990s, bicycle frames were mainly made of chromium-molybdenum steel. It has good torsional and tensile properties, welding at high temperatures will not affect the material, cheap. But the weight is large and easy to oxidize.
(2) carbon fiber frame: light weight, can absorb the impact of the ground, material backwash fast, etc., is the ideal bicycle frame material. The greater the tonnage of carbon fiber, the higher the elasticity, the higher the price. There are several manufacturing methods, such as bonding on a mold, carbon fiber overlap, heat treatment, solidification, and molding.
(3) Titanium frame: titanium is 55% lighter than steel and not easy to oxidize. In order to improve the tensile strength of titanium alloy, the use of aluminum, vanadium and other mixed materials welded under vacuum conditions is a complex and expensive process.
Expanded Information:
Bicycle models are represented by the letters of the Hanyu Pinyin alphabet, followed by a set of Arabic numerals. Such as pa-17 type, qf-65 type, za-41 type. The meaning is: the first letter indicates the type of bicycle.
such as: p for ordinary type, q for lightweight type, z for load type, s for racing type, x for small wheel type, t for special type. The second letter stands for the style and specifications of the bike. Style refers to men's or women's bikes. For example, the letters a (28 inches), c (20 inches), e (26 inches) ...... These singular letters also stand for men's bikes.
And the letter b (28 inches), d (27 inches), f (26 inches), these even letters represent women's cars. The Arabic numerals that follow the letters are the sequential numbers of the factory design.